EX-99

                                                                    Exhibit 99.1



                            Explanation of Responses


(1)  The shares of Common Stock, par value $0.01 per share, of the Issuer
     reported herein (the "Shares") are held directly by Standard General Master
     Fund L.P., a Cayman Islands exempted limited partnership ("Standard General
     Master Fund"). Standard General L.P., a Delaware limited partnership
     ("Standard General"), serves as the investment manager of Standard General
     Master Fund and pursuant to an investment management agreement has all
     investment and voting power with respect to the securities held by Standard
     General Master Fund. Mr. Soohyung Kim ("Mr. Kim") and Mr. Nicholas J.
     Singer ("Mr. Singer") have controlling interests in Standard General S
     Corp., a Delaware corporation, which is the general partner of Standard
     General Holdings, L.P., a Delaware limited partnership, which is in turn
     the general partner of Standard General. In addition, Mr. Kim and Mr.
     Singer serve as co-managing members of Standard General Management LLC, a
     Delaware limited liability company, which is the managing member of
     Standard General GP LLC, a Delaware limited liability company, which is in
     turn the general partner of Standard General Master Fund. Standard General,
     Mr. Kim and Mr. Singer (Standard General, Mr. Kim and Mr. Singer, together
     with Standard General Master Fund, the "Reporting Persons") may be deemed
     to beneficially own the Shares by virtue of the foregoing relationships. In
     accordance with instruction 4(b)(iv), the entire number of the securities
     that may be deemed to be beneficially owned by the Reporting Persons is
     reported herein. Each of the Reporting Persons hereby disclaims beneficial
     ownership of the reported securities for purposes of Section 16 of the
     Securities Exchange Act of 1934 except to the extent of his or its
     pecuniary interest therein.

EX-99

                                                                    Exhibit 99.2
                         FORM 4 JOINT FILER INFORMATION

          (Attachment to Form 4 in accordance with instruction 4(b)(v))

Check this box if no longer subject to
  Section 16:                             [ ]

Name and Address:                         Standard General Master Fund L.P.
                                          Walkers SPV Limited, Walker House,
                                          Mary Street, George Town
                                          Grand Cayman, Cayman Islands KY1-1002

Issuer and Ticker Symbol:                 Penn Octane Corporation (POCC)

Date of Earliest Transaction:             5/22/08

Relationship to Issuer:                   10% Owner

Designated Filer:                         Standard General L.P.

TABLE I INFORMATION
Title of Security:                        Common Stock
Transaction Date:                         5/22/08
Transaction Code:                         P
Securities Acquired:                      13,000
Acquired or Disposed:                     A
Price:                                    $1.6638
Ownership Form:                           D
Amount Beneficially Owned After
  Transaction:                            3,390,318
Nature of Indirect Beneficial
  Ownership:

Title of Security:                        Common Stock
Transaction Date:                         5/23/08
Transaction Code:                         P
Securities Acquired:                      12,500
Acquired or Disposed:                     A
Price:                                    $1.7571
Ownership Form:                           D
Amount Beneficially Owned After
  Transaction:                            3,402,818
Nature of Indirect Beneficial
  Ownership:

Signature:                                STANDARD GENERAL MASTER FUND L.P.
                                          By:  Standard General GP LLC,
                                               its General Partner
                                               By:  Standard General Management
                                                    LLC, its Managing Member


                                          By: /s/ Soohyung Kim
                                              ----------------------------------
                                              Name:   Soohyung Kim
                                              Title:  Co-Managing Member of
                                                      Standard General
                                                      Management, LLC

EX-99

                                                                    Exhibit 99.3
                         FORM 4 JOINT FILER INFORMATION

          (Attachment to Form 4 in accordance with instruction 4(b)(v))

Check this box if no longer subject to
  Section 16:                             [ ]

Name and Address:                         Soohyung Kim
                                          650 Madison Avenue, 26th Floor
                                          New York, NY 10022

Issuer and Ticker Symbol:                 Penn Octane Corporation (POCC)

Date of Earliest Transaction:             5/22/08

Relationship to Issuer:                   10% Owner

Designated Filer:                         Standard General L.P.

TABLE I INFORMATION
Title of Security:                        Common Stock
Transaction Date:                         5/22/08
Transaction Code:                         P
Securities Acquired:                      13,000
Acquired or Disposed:                     A
Price:                                    $1.6638
Ownership Form:                           I
Amount Beneficially Owned After
  Transaction:                            3,390,318
Nature of Indirect Beneficial
  Ownership:                              (1)

Title of Security:                        Common Stock
Transaction Date:                         5/23/08
Transaction Code:                         P
Securities Acquired:                      12,500
Acquired or Disposed:                     A
Price:                                    $1.7571
Ownership Form:                           I
Amount Beneficially Owned After
  Transaction:                            3,402,818
Nature of Indirect Beneficial
  Ownership:                              (1)

Signature:

                                          /s/ Soohyung Kim
                                          --------------------------------------
                                          Soohyung Kim

EX-99

                                                                    Exhibit 99.4
                         FORM 4 JOINT FILER INFORMATION

          (Attachment to Form 4 in accordance with instruction 4(b)(v))

Check this box if no longer subject to
  Section 16:                             [ ]

Name and Address:                         Nicholas J. Singer
                                          650 Madison Avenue, 26th Floor
                                          New York, NY 10022

Issuer and Ticker Symbol:                 Penn Octane Corporation (POCC)

Date of Earliest Transaction:             5/22/08

Relationship to Issuer:                   10% Owner

Designated Filer:                         Standard General L.P.

TABLE I INFORMATION
Title of Security:                        Common Stock
Transaction Date:                         5/22/08
Transaction Code:                         P
Securities Acquired:                      13,000
Acquired or Disposed:                     A
Price:                                    $1.6638
Ownership Form:                           I
Amount Beneficially Owned After
  Transaction:                            3,390,318
Nature of Indirect Beneficial
  Ownership:                              (1)

Title of Security:                        Common Stock
Transaction Date:                         5/23/08
Transaction Code:                         P
Securities Acquired:                      12,500
Acquired or Disposed:                     A
Price:                                    $1.7571
Ownership Form:                           I
Amount Beneficially Owned After
  Transaction:                            3,402,818
Nature of Indirect Beneficial
  Ownership:                              (1)

Signature:

                                          /s/ Nicholas J. Singer
                                          --------------------------------------
                                          Nicholas J. Singer